Easy Heat Roof De-Icer Kit Calculation

BR-R-R! It’s that time of year when old man winter shows his mighty strength and causes damage to roofs with his ice and snow. Now is the time of year to do preventative work and install EASY HEAT Roof De-Icer kits and not allow ice to build up on your customers’ roofs, saving them all kinds of expensive repairs due to water damage.
How is the correct amount of de-icer cable determined? An accurate estimation of the cable length is necessary since you cannot cut, splice or alter it in any way. These could result in fire, electrocution or ice dam formations. EASY HEAT takes the guesswork out of it with their Cable Length Estimation Formula. Just follow the estimation formula and you will know exactly what size roof de-icer kit to install:
FOR TYPICAL ROOF APPLICATION
For each area listed in Table B-1, measure the required dimensions (see Figures B-1 and B-2) and calculate the length of cable needed. Add each “area” calculation to determine the total cable length needed.
Table B-1 Cable Length Estimation Formula for Typical Rood Applications

Area

What to Measure

How to Calculate

Along Roof

Overhang(A)Length along roof (B)

Length of roof (B) x
Overhang Multiplier (see Table B-2)

Dormer

Distance around dormer (C)

Number of dormers x distance
around dormer(s) (C)

Valley

Number of valleys (D)

Number of valleys (D) x 6
feet or 1.8 meters

Downspouts

Number of downspoutsLength
of downspouts (E)

Number of downspouts x
length of downspouts (E) x 2

Table B-2Overhang Multiplier

Roof Overhang

InchesCentimeters

Multiplier

forroof

with gutter

Multiplier

forroof without gutter

Less than 12

Less than 30

4.0

3.0

12

30

4.0

3.0

24

60

5.3

4.3

36

90

6.8

5.8

48

120

8.1

7.1

60

150

9.6

8.6

72

180

11.2

10.2

Help your customers stand up to old man winter and prevent costly repairs from his snow and ice build-up. Install roof de-icer kits from Easy Heat.